Case Presentation: A 57-year-old male presents with a morbilliform rash on his extremities, trunk, and back. One week prior, he started sulfamethoxazole/trimethoprim for cellulitis. On his sixth day of treatment, the patient became acutely febrile to 102°F, with rash eruption one day later. Therefore, he presented to the hospital for further evaluation. On arrival, he [...]